<?php
$data = array(
	array(
		'id_group'	=> 1,
		'id_user'		=> 1
	),
	array(
		'id_group'	=> 1,
		'id_user'		=> 2
	),
	array(
		'id_group'	=> 2,
		'id_user'		=> 2
	)
);
?>